causal FIR digital filter h(n) is to be designed using the inverse DFT. Assume that its desired frequency response He) is available for 0 w . aWhen generating H(k,He is to sampled as w =kw, where w is known. Find the DFT order N in terms of Aw. bThe pseudocode below uses the inverse DFT or FFT to generate hn.Give the correct value for W.in the first line of code c Give the correct expression for X,in terms of N,in the second line of code d Give Y,in the third line of code,using N rather than Aw. e Give the correct expression for Z,in the fifth line of code H(0=H(expjW)) For 1≤k≤X w(k) = Y H(k=Hexp(jw(k))) H(N-k=Z End h(n=DFT{H(k)}